So target keywords are used for the file names generated by Journalist AI.
If I upload the featured image on the shopify blog page the file name is retained.
Your AI image generator is creating the files. The seo keywords should be implemented there. Then the files will have seo names the first time they're uploaded via api. I understand that you can't change the image file name after it's been published. And you probably can't change existing image file names on a site.